Bug#608148: linux-2.6: KMS results in freeze during suspend to RAM (drm/i915 misses some quirks)

[Jonathan Nieder <jrnieder@gmail.com>]

# regression
severity 608148 important
tags 608148 + moreinfo
quit

Hi Ferenc,

Ferenc Wagner wrote:

> The switch to KMS results in broken suspend on some systems due to the
> Intel video driver missing some quirks present in the past UMS driver.
> Please refer to https://bugs.freedesktop.org/show_bug.cgi?id=22126.
> The upstream Linux commit fixing this is b690e96c.

Sorry for the long silence.  As mentioned at [1], unfortunately that
commit had bad side effects, described here:

  https://bugs.freedesktop.org/29413

If we want to try again, we should also apply

  897493504add drm/i915: Ensure that the crtcinfo is populated during
               mode_fixup

Are you able to reproduce [1] using the 2.6.32-31 kernel from
snapshot.debian.org?  If so, I think the proper fix would be worth a
try, and I can send further instructions.

Thanks and hope that helps,
Jonathan

[1] http://bugs.debian.org/618665